sha1_name: add get_sha1_with_context()
[gitweb.git] / sha1_name.c
index 9215ad1d050c427b67124f4c5ca76e60e8e022f0..7fdb20277f16c05213479e3a757745f56096f3f1 100644 (file)
@@ -280,8 +280,7 @@ int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref)
                                *ref = xstrdup(r);
                        if (!warn_ambiguous_refs)
                                break;
-               } else if ((flag & REF_ISSYMREF) &&
-                          (len != 4 || strcmp(str, "HEAD")))
+               } else if ((flag & REF_ISSYMREF) && strcmp(fullref, "HEAD"))
                        warning("ignoring dangling symref %s.", fullref);
        }
        free(last_branch);
@@ -399,6 +398,10 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
                unsigned long co_time;
                int co_tz, co_cnt;
 
+               /* a @{-N} placed anywhere except the start is an error */
+               if (str[at+2] == '-')
+                       return -1;
+
                /* Is it asking for N-th entry, or approxidate? */
                for (i = nth = 0; 0 <= nth && i < reflog_len; i++) {
                        char ch = str[at+2+i];
@@ -413,9 +416,12 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
                } else if (0 <= nth)
                        at_time = 0;
                else {
+                       int errors = 0;
                        char *tmp = xstrndup(str + at + 2, reflog_len);
-                       at_time = approxidate(tmp);
+                       at_time = approxidate_careful(tmp, &errors);
                        free(tmp);
+                       if (errors)
+                               return -1;
                }
                if (read_ref_at(real_ref, at_time, nth, sha1, NULL,
                                &co_time, &co_tz, &co_cnt)) {
@@ -878,8 +884,28 @@ int interpret_branch_name(const char *name, struct strbuf *buf)
 
        if (!len)
                return len; /* syntax Ok, not enough switches */
-       if (0 < len)
-               return len; /* consumed from the front */
+       if (0 < len && len == namelen)
+               return len; /* consumed all */
+       else if (0 < len) {
+               /* we have extra data, which might need further processing */
+               struct strbuf tmp = STRBUF_INIT;
+               int used = buf->len;
+               int ret;
+
+               strbuf_add(buf, name + len, namelen - len);
+               ret = interpret_branch_name(buf->buf, &tmp);
+               /* that data was not interpreted, remove our cruft */
+               if (ret < 0) {
+                       strbuf_setlen(buf, used);
+                       return len;
+               }
+               strbuf_reset(buf);
+               strbuf_addbuf(buf, &tmp);
+               strbuf_release(&tmp);
+               /* tweak for size of {-N} versus expanded ref name */
+               return ret - used + len;
+       }
+
        cp = strchr(name, '@');
        if (!cp)
                return -1;
@@ -907,8 +933,8 @@ int interpret_branch_name(const char *name, struct strbuf *buf)
  */
 int get_sha1(const char *name, unsigned char *sha1)
 {
-       unsigned unused;
-       return get_sha1_with_mode(name, sha1, &unused);
+       struct object_context unused;
+       return get_sha1_with_context(name, sha1, &unused);
 }
 
 /* Must be called only when object_name:filename doesn't exist. */
@@ -966,13 +992,15 @@ static void diagnose_invalid_index_path(int stage,
        pos = cache_name_pos(filename, namelen);
        if (pos < 0)
                pos = -pos - 1;
-       ce = active_cache[pos];
-       if (ce_namelen(ce) == namelen &&
-           !memcmp(ce->name, filename, namelen))
-               die("Path '%s' is in the index, but not at stage %d.\n"
-                   "Did you mean ':%d:%s'?",
-                   filename, stage,
-                   ce_stage(ce), filename);
+       if (pos < active_nr) {
+               ce = active_cache[pos];
+               if (ce_namelen(ce) == namelen &&
+                   !memcmp(ce->name, filename, namelen))
+                       die("Path '%s' is in the index, but not at stage %d.\n"
+                           "Did you mean ':%d:%s'?",
+                           filename, stage,
+                           ce_stage(ce), filename);
+       }
 
        /* Confusion between relative and absolute filenames? */
        fullnamelen = namelen + strlen(prefix);
@@ -982,13 +1010,15 @@ static void diagnose_invalid_index_path(int stage,
        pos = cache_name_pos(fullname, fullnamelen);
        if (pos < 0)
                pos = -pos - 1;
-       ce = active_cache[pos];
-       if (ce_namelen(ce) == fullnamelen &&
-           !memcmp(ce->name, fullname, fullnamelen))
-               die("Path '%s' is in the index, but not '%s'.\n"
-                   "Did you mean ':%d:%s'?",
-                   fullname, filename,
-                   ce_stage(ce), fullname);
+       if (pos < active_nr) {
+               ce = active_cache[pos];
+               if (ce_namelen(ce) == fullnamelen &&
+                   !memcmp(ce->name, fullname, fullnamelen))
+                       die("Path '%s' is in the index, but not '%s'.\n"
+                           "Did you mean ':%d:%s'?",
+                           fullname, filename,
+                           ce_stage(ce), fullname);
+       }
 
        if (!lstat(filename, &st))
                die("Path '%s' exists on disk, but not in the index.", filename);
@@ -1001,12 +1031,24 @@ static void diagnose_invalid_index_path(int stage,
 
 
 int get_sha1_with_mode_1(const char *name, unsigned char *sha1, unsigned *mode, int gently, const char *prefix)
+{
+       struct object_context oc;
+       int ret;
+       ret = get_sha1_with_context_1(name, sha1, &oc, gently, prefix);
+       *mode = oc.mode;
+       return ret;
+}
+
+int get_sha1_with_context_1(const char *name, unsigned char *sha1,
+                           struct object_context *oc,
+                           int gently, const char *prefix)
 {
        int ret, bracket_depth;
        int namelen = strlen(name);
        const char *cp;
 
-       *mode = S_IFINVALID;
+       memset(oc, 0, sizeof(*oc));
+       oc->mode = S_IFINVALID;
        ret = get_sha1_1(name, namelen, sha1);
        if (!ret)
                return ret;
@@ -1029,6 +1071,11 @@ int get_sha1_with_mode_1(const char *name, unsigned char *sha1, unsigned *mode,
                        cp = name + 3;
                }
                namelen = namelen - (cp - name);
+
+               strncpy(oc->path, cp,
+                       sizeof(oc->path));
+               oc->path[sizeof(oc->path)-1] = '\0';
+
                if (!active_cache)
                        read_cache();
                pos = cache_name_pos(cp, namelen);
@@ -1041,7 +1088,6 @@ int get_sha1_with_mode_1(const char *name, unsigned char *sha1, unsigned *mode,
                                break;
                        if (ce_stage(ce) == stage) {
                                hashcpy(sha1, ce->sha1);
-                               *mode = ce->ce_mode;
                                return 0;
                        }
                        pos++;
@@ -1068,12 +1114,17 @@ int get_sha1_with_mode_1(const char *name, unsigned char *sha1, unsigned *mode,
                }
                if (!get_sha1_1(name, cp-name, tree_sha1)) {
                        const char *filename = cp+1;
-                       ret = get_tree_entry(tree_sha1, filename, sha1, mode);
+                       ret = get_tree_entry(tree_sha1, filename, sha1, &oc->mode);
                        if (!gently) {
                                diagnose_invalid_sha1_path(prefix, filename,
                                                           tree_sha1, object_name);
                                free(object_name);
                        }
+                       hashcpy(oc->tree, tree_sha1);
+                       strncpy(oc->path, filename,
+                               sizeof(oc->path));
+                       oc->path[sizeof(oc->path)-1] = '\0';
+
                        return ret;
                } else {
                        if (!gently)